package com.base.operator;

public class demo05 {
    public static void main(String[] args) {
        int a = 10;
        int b = 20;

        a+=b; //a=a+b
        a-=b; //a=a-b

        System.out.println(a);


        //字符串连接  +
        System.out.println(""+a+b);
        System.out.println(a+b+"");

    }
}
